| e02cac | nag_2d_cheb_fit_lines Least-squares surface fit by polynomials, data on lines |
| e02dcc | nag_2d_spline_fit_grid Least-squares bicubic spline fit with automatic knot placement, two variables (rectangular grid) |
| e02ddc | nag_2d_spline_fit_scat Least-squares bicubic spline fit with automatic knot placement, two variables (scattered data) |